Linemen Institute Practice Test 2026 – Comprehensive Exam Preparation

Lockout/tagout is about making sure all energy sources are isolated and cannot re-energize the equipment while maintenance is being done. The typical sequence starts with informing the people who might be affected, then shutting the equipment down, then isolating all energy sources, applying lockout or tagout devices to prevent re-energization, verifying that there is zero energy present, performing the maintenance job, and finally removing the devices only after verification so the system can be safely re-energized.

This order matters because it prevents unexpected energization, ensures stored or residual energy is managed, and provides clear authority for removing the devices. If you skip notifying, skip isolating energy sources, or perform maintenance before verifying zero energy, you create a real risk to anyone working on the equipment.